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大学・研究所にある論文を検索できる 「Nano- and micro-structural control of WO3 photoelectrode films through aqueous synthesis of WO3･H2O and (NH4)0.33WO3 precursors」の論文概要。リケラボ論文検索は、全国の大学リポジトリにある学位論文・教授論文を一括検索できる論文検索サービスです。
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Nano- and micro-structural control of WO3 photoelectrode films through aqueous synthesis of WO3･H2O and (NH4)0.33WO3 precursors

Uchiyama Hiroaki 10551319 Nagayasu Yuki 関西大学 DOI:10.1039/D0RA01321H

2020.03.20

概要

Nano- and micro-structured tungsten trioxide (WO3) photoelectrode films were prepared through an aqueous solution route. WO3 precursor layers were deposited on glass substrates through heterogeneous nucleation from (NH4)10W12O41 aqueous solutions at 50–60 ◦C. The crystal phase of the precursors changed from WO3$H2O to (NH4)0.33WO3 with increasing (NH4)10W12O41 concentration (x), which involved a morphological change from micron-scale plates to nano-scale fine particles. The WO3$H2O and (NH4)0.33WO3 layers were thermally converted to the monoclinic WO3 phase. The fine- particle WO3 films obtained from (NH4)0.33WO3 layers showed a better photoanodic performance in the UV range below 350 nm, which was attributed to the larger surface area arising from the porous structure. On the other hand, platy-particle WO3 films were obtained from WO3$H2O layers, which exhibited strong light scattering in the visible range, and resulted in an enhanced photoanodic response at wavelengths above 375 nm.

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